How do I find out which gem has a specific dependency?

Question

I commented out a gem, but 'bundle install' still won't run. How do I find out which gem has a dependency on sys-proctable?

$ bundle install Fetching gem metadata from https://rubygems.org/......... Fetching gem metadata from https://rubygems.org/.. Resolving dependencies... Could not find sys-proctable-0.9.2 in any of the sources  $ grep proctable Gemfile   #gem 'sys-proctable', '0.9.2', :path => "vendor/gems"  $ bundle list Resolving dependencies... Could not find gem 'rspec-rails (= 2.11.0) ruby' in the gems available on this machine.  $ bundle viz Resolving dependencies... Could not find gem 'rspec-rails (= 2.11.0) ruby' in the gems available on this machine.  $ bundle -v Bundler version 1.3.0  $ ruby -v ruby 1.9.3p385 (2013-02-06 revision 39114) [i386-cygwin] 

Gemfile: http://pastebin.com/9WWMfKtv

I've already tried these troubleshooting steps: https://github.com/carlhuda/bundler/blob/1-2-stable/ISSUES.md

Answer 1

In the bash shell you can do:

gem dependency name_of_the_gem --reverse-dependencies

For instance:

$ gem dependency activesupport --reverse-dependencies                         Gem activesupport-2.3.14 Used by actionpack-2.3.14 (activesupport (= 2.3.14)) activerecord-2.3.14 (activesupport (= 2.3.14)) activeresource-2.3.14 (activesupport (= 2.3.14)) 

Answer 2

I know this answer includes a link, but this is not a link specific answer

You can always check the reverse dependencies of a gem on rubygems.org. There's a link on the right side panel on the website.

Or you can visit the site

https://rubygems.org/gems/{gem_name}/reverse_dependencies

So, in your case

https://rubygems.org/gems/sys-proctable/reverse_dependencies